package j05linkedhashmap;

import java.util.HashMap;
import java.util.Hashtable;
import java.util.Map;

public class J3table {
    public static void main(String[] args) {
//        Map<String,Integer> map = new HashMap<>();
        Map<String,Integer> map = new Hashtable<>();
        map.put(null,2);
        map.put(null,20);
        System.out.println(map);
    }
}
